<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
<title>GraphChi: src/shards/memoryshard.hpp Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="dynsections.js"></script>
<link href="search/search.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="search/search.js"></script>
<script type="text/javascript">
  $(document).ready(function() { searchBox.OnSelectItem(0); });
</script>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
 <tbody>
 <tr style="height: 56px;">
  <td style="padding-left: 0.5em;">
   <div id="projectname">GraphChi
   &#160;<span id="projectnumber">0.1</span>
   </div>
  </td>
 </tr>
 </tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.8.1.1 -->
<script type="text/javascript">
var searchBox = new SearchBox("searchBox", "search",false,'Search');
</script>
  <div id="navrow1" class="tabs">
    <ul class="tablist">
      <li><a href="index.html"><span>Main&#160;Page</span></a></li>
      <li><a href="namespaces.html"><span>Namespaces</span></a></li>
      <li><a href="annotated.html"><span>Classes</span></a></li>
      <li class="current"><a href="files.html"><span>Files</span></a></li>
      <li>
        <div id="MSearchBox" class="MSearchBoxInactive">
        <span class="left">
          <img id="MSearchSelect" src="search/mag_sel.png"
               onmouseover="return searchBox.OnSearchSelectShow()"
               onmouseout="return searchBox.OnSearchSelectHide()"
               alt=""/>
          <input type="text" id="MSearchField" value="Search" accesskey="S"
               onfocus="searchBox.OnSearchFieldFocus(true)" 
               onblur="searchBox.OnSearchFieldFocus(false)" 
               onkeyup="searchBox.OnSearchFieldChange(event)"/>
          </span><span class="right">
            <a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a>
          </span>
        </div>
      </li>
    </ul>
  </div>
  <div id="navrow2" class="tabs2">
    <ul class="tablist">
      <li><a href="files.html"><span>File&#160;List</span></a></li>
      <li><a href="globals.html"><span>File&#160;Members</span></a></li>
    </ul>
  </div>
<!-- window showing the filter options -->
<div id="MSearchSelectWindow"
     onmouseover="return searchBox.OnSearchSelectShow()"
     onmouseout="return searchBox.OnSearchSelectHide()"
     onkeydown="return searchBox.OnSearchSelectKey(event)">
<a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark">&#160;</span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark">&#160;</span>Classes</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark">&#160;</span>Namespaces</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark">&#160;</span>Files</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(4)"><span class="SelectionMark">&#160;</span>Functions</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(5)"><span class="SelectionMark">&#160;</span>Variables</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(6)"><span class="SelectionMark">&#160;</span>Typedefs</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(7)"><span class="SelectionMark">&#160;</span>Enumerations</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(8)"><span class="SelectionMark">&#160;</span>Macros</a></div>

<!-- iframe showing the search results (closed by default) -->
<div id="MSearchResultsWindow">
<iframe src="javascript:void(0)" frameborder="0" 
        name="MSearchResults" id="MSearchResults">
</iframe>
</div>

<div id="nav-path" class="navpath">
  <ul>
<li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li><li class="navelem"><a class="el" href="dir_790e1622981d7d2483637b884e4bb1c1.html">shards</a></li>  </ul>
</div>
</div><!-- top -->
<div class="header">
  <div class="headertitle">
<div class="title">memoryshard.hpp</div>  </div>
</div><!--header-->
<div class="contents">
<a href="memoryshard_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;</div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="preprocessor">#ifndef DEF_GRAPHCHI_MEMSHARD</span></div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define DEF_GRAPHCHI_MEMSHARD</span></div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="preprocessor">#include &lt;iostream&gt;</span></div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="preprocessor">#include &lt;cstdio&gt;</span></div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="preprocessor">#include &lt;sstream&gt;</span></div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</span></div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="preprocessor">#include &lt;fcntl.h&gt;</span></div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="preprocessor">#include &lt;unistd.h&gt;</span></div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="preprocessor">#include &lt;assert.h&gt;</span></div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="preprocessor">#include &lt;string&gt;</span></div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="graph__objects_8hpp.html">api/graph_objects.hpp</a>&quot;</span></div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="metrics_8hpp.html">metrics/metrics.hpp</a>&quot;</span></div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="stripedio_8hpp.html">io/stripedio.hpp</a>&quot;</span></div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="preprocessor">#include &quot;graphchi_types.hpp&quot;</span></div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;<span class="keyword">namespace </span>graphchi {</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> VT, <span class="keyword">typename</span> ET, <span class="keyword">typename</span> svertex_t = graphchi_vertex&lt;VT, ET&gt;, <span class="keyword">typename</span> ETspecial = ET&gt;</div>
<div class="line"><a name="l00052"></a><span class="lineno"><a class="code" href="classgraphchi_1_1memory__shard.html">   52</a></span>&#160;    <span class="keyword">class </span><a class="code" href="classgraphchi_1_1memory__shard.html">memory_shard</a> {</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;        </div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;        <a class="code" href="classgraphchi_1_1stripedio.html">stripedio</a> * iomgr;</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;        </div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;        std::string filename_edata;</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;        std::string filename_adj;</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;        vid_t range_st;</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;        vid_t range_end;</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;        <span class="keywordtype">size_t</span> adjfilesize;</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;        <span class="keywordtype">size_t</span> edatafilesize;</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;        </div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;        <span class="keywordtype">size_t</span> edgeptr;</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;        vid_t streaming_offset_vid;</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;        <span class="keywordtype">size_t</span> streaming_offset; <span class="comment">// The offset where streaming should continue</span></div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;        <span class="keywordtype">size_t</span> range_start_offset; <span class="comment">// First byte for this range&#39;s vertices (used for writing only outedges)</span></div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;        <span class="keywordtype">size_t</span> range_start_edge_ptr;</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;        <span class="keywordtype">size_t</span> streaming_offset_edge_ptr;</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;        uint8_t * adjdata;</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;        ET * edgedata;</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;        <a class="code" href="classgraphchi_1_1metrics.html">metrics</a> &amp;m;</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;        uint64_t chunkid;</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;        </div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;        <span class="keywordtype">int</span> edata_iosession;</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;        <span class="keywordtype">int</span> adj_session;</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;        <a class="code" href="structgraphchi_1_1streaming__task.html">streaming_task</a> adj_stream_session;</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;        </div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;        <span class="keywordtype">bool</span> is_loaded;</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;        </div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;    <span class="keyword">public</span>:</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;        <span class="keywordtype">bool</span> only_adjacency;</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;        </div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;        <a class="code" href="classgraphchi_1_1memory__shard.html">memory_shard</a>(<a class="code" href="classgraphchi_1_1stripedio.html">stripedio</a> * iomgr, </div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;                     std::string _filename_edata,</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;                     std::string _filename_adj,</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;                     vid_t _range_start, </div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;                     vid_t _range_end, </div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;                     <a class="code" href="classgraphchi_1_1metrics.html">metrics</a> &amp;_m) : iomgr(iomgr), filename_edata(_filename_edata),</div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;                    filename_adj(_filename_adj),</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;        range_st(_range_start), range_end(_range_end), m(_m) {</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;            edgedata = NULL;</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;            adjdata = NULL;</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;            only_adjacency = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;            is_loaded = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;            adj_session = -1;</div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;            edata_iosession = -1;</div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;        }</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;        </div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;        ~<a class="code" href="classgraphchi_1_1memory__shard.html">memory_shard</a>() {</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;            <span class="keywordflow">if</span> (edata_iosession &gt;= 0) {</div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;                <span class="keywordflow">if</span> (edgedata != NULL) iomgr-&gt;managed_release(edata_iosession, &amp;edgedata);</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;                iomgr-&gt;close_session(edata_iosession);</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;            }</div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;            <span class="keywordflow">if</span> (adj_session &gt;= 0) {</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;                <span class="keywordflow">if</span> (adjdata != NULL) iomgr-&gt;managed_release(adj_session, &amp;adjdata);</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;                iomgr-&gt;close_session(adj_session);</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;            }</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;        }</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;        </div>
<div class="line"><a name="l00112"></a><span class="lineno"><a class="code" href="classgraphchi_1_1memory__shard.html#a7b1304bddd0f80bda65a3e15ac7e7e3e">  112</a></span>&#160;        <span class="keywordtype">void</span> <a class="code" href="classgraphchi_1_1memory__shard.html#a7b1304bddd0f80bda65a3e15ac7e7e3e">commit</a>(<span class="keywordtype">bool</span> all) {</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;            <span class="keywordflow">if</span> (edgedata == NULL || only_adjacency) <span class="keywordflow">return</span>; </div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;            assert(is_loaded);</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;            <a class="code" href="structgraphchi_1_1metrics__entry.html">metrics_entry</a> cm = m.start_time();</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;            </div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;            <span class="keywordflow">if</span> (all) {</div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;                iomgr-&gt;managed_pwritea_now(edata_iosession, &amp;edgedata, edatafilesize, 0);</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;            } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;                <span class="keywordtype">size_t</span> last = streaming_offset_edge_ptr;</div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;                <span class="keywordflow">if</span> (last == 0){</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;                    <span class="comment">// rollback</span></div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;                    last = edatafilesize;</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;                }   </div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;                <span class="keywordtype">char</span> * bufp = ((<span class="keywordtype">char</span>*)edgedata + range_start_edge_ptr);</div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;                iomgr-&gt;managed_pwritea_now(edata_iosession, &amp;bufp, last - range_start_edge_ptr, range_start_edge_ptr);</div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;                </div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;            }</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;            m.stop_time(cm, <span class="stringliteral">&quot;memshard_commit&quot;</span>);</div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;            </div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;            iomgr-&gt;managed_release(adj_session, &amp;adjdata);</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;            iomgr-&gt;managed_release(edata_iosession, &amp;edgedata);</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;            is_loaded = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;        }</div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;        </div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;        <span class="keywordtype">bool</span> loaded() {</div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;            <span class="keywordflow">return</span> is_loaded;</div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;        }</div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;        </div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;        <span class="comment">// TODO: recycle ptr!</span></div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;        <span class="keywordtype">void</span> load() {</div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;            is_loaded = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;            adjfilesize = get_filesize(filename_adj);</div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;            edatafilesize = get_filesize(filename_edata);</div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;            </div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;            <span class="keywordtype">bool</span> async_inedgedata_loading = !svertex_t().computational_edges();</div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;            </div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;<span class="preprocessor">#ifdef SUPPORT_DELETIONS</span></div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;<span class="preprocessor"></span>            async_inedgedata_loading = <span class="keyword">false</span>;  <span class="comment">// Currently we encode the deleted status of an edge into the edge value (should be changed!),</span></div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;                                               <span class="comment">// so we need the edge data while loading</span></div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;<span class="preprocessor"></span>                        </div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;            <span class="comment">//preada(adjf, adjdata, adjfilesize, 0);</span></div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;            </div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;            adj_session = iomgr-&gt;open_session(filename_adj, <span class="keyword">true</span>);</div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;            iomgr-&gt;managed_malloc(adj_session, &amp;adjdata, adjfilesize, 0);</div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;            adj_stream_session = streaming_task(iomgr, adj_session, adjfilesize, (<span class="keywordtype">char</span>**) &amp;adjdata);</div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;            </div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;            iomgr-&gt;launch_stream_reader(&amp;adj_stream_session);            </div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;            <span class="comment">/* Initialize edge data asynchonous reading */</span></div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;            <span class="keywordflow">if</span> (!only_adjacency) {</div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;                edata_iosession = iomgr-&gt;open_session(filename_edata, <span class="keyword">false</span>);</div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;                </div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;                iomgr-&gt;managed_malloc(edata_iosession, &amp;edgedata, edatafilesize, 0);</div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;                <span class="keywordflow">if</span> (async_inedgedata_loading) {</div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;                    iomgr-&gt;managed_preada_async(edata_iosession, &amp;edgedata, edatafilesize, 0);</div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;                } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;                    iomgr-&gt;managed_preada_now(edata_iosession, &amp;edgedata, edatafilesize, 0);</div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;                }</div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;            }</div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;        }</div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;        </div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;        <span class="keyword">inline</span> <span class="keywordtype">void</span> check_stream_progress(<span class="keywordtype">int</span> toread, <span class="keywordtype">size_t</span> pos) {</div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;            <span class="keywordflow">if</span> (adj_stream_session.curpos == adjfilesize) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;            </div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;            <span class="keywordflow">while</span>(adj_stream_session.curpos &lt; toread+pos) {</div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;                usleep(20000);</div>
<div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;                <span class="keywordflow">if</span> (adj_stream_session.curpos == adjfilesize) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;            }</div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;        }</div>
<div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;        </div>
<div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;        <span class="keywordtype">void</span> load_vertices(vid_t window_st, vid_t window_en, std::vector&lt;svertex_t&gt; &amp; prealloc, <span class="keywordtype">bool</span> inedges=<span class="keyword">true</span>, <span class="keywordtype">bool</span> outedges=<span class="keyword">true</span>) {</div>
<div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;            <span class="comment">/* Find file size */</span></div>
<div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;            </div>
<div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;            m.start_time(<span class="stringliteral">&quot;memoryshard_create_edges&quot;</span>);</div>
<div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;            </div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;            assert(adjdata != NULL);</div>
<div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;            </div>
<div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;            <span class="comment">// Now start creating vertices</span></div>
<div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;            uint8_t * ptr = adjdata;</div>
<div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;            uint8_t * end = ptr + adjfilesize;</div>
<div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;            vid_t vid = 0;</div>
<div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;            edgeptr = 0;</div>
<div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;            </div>
<div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;            streaming_offset = 0;</div>
<div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;            streaming_offset_vid = 0;</div>
<div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;            streaming_offset_edge_ptr = 0;</div>
<div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;            range_start_offset = adjfilesize;</div>
<div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;            range_start_edge_ptr = edatafilesize;</div>
<div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;            </div>
<div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;            <span class="keywordtype">bool</span> setoffset = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;            <span class="keywordtype">bool</span> setrangeoffset = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;            <span class="keywordflow">while</span> (ptr &lt; end) {</div>
<div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;                check_stream_progress(6, ptr-adjdata); <span class="comment">// read at least 6 bytes</span></div>
<div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;                <span class="keywordflow">if</span> (!setoffset &amp;&amp; vid &gt; range_end) {</div>
<div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;                    <span class="comment">// This is where streaming should continue. Notice that because of the</span></div>
<div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;                    <span class="comment">// non-zero counters, this might be a bit off.</span></div>
<div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;                    streaming_offset = ptr-adjdata;</div>
<div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;                    streaming_offset_vid = vid;</div>
<div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;                    streaming_offset_edge_ptr = edgeptr;</div>
<div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;                    setoffset = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;                }</div>
<div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;                <span class="keywordflow">if</span> (!setrangeoffset &amp;&amp; vid&gt;=range_st) {</div>
<div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;                    range_start_offset = ptr-adjdata;</div>
<div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;                    range_start_edge_ptr = edgeptr;</div>
<div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;                    setrangeoffset = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;                }</div>
<div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;                </div>
<div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;                uint8_t ns = *ptr;</div>
<div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;                <span class="keywordtype">int</span> n;</div>
<div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;                </div>
<div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;                ptr += <span class="keyword">sizeof</span>(uint8_t);</div>
<div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;                </div>
<div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;                <span class="keywordflow">if</span> (ns == 0x00) {</div>
<div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;                    <span class="comment">// next value tells the number of vertices with zeros</span></div>
<div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;                    uint8_t nz = *ptr;</div>
<div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;                    ptr += <span class="keyword">sizeof</span>(uint8_t);</div>
<div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;                    vid++;</div>
<div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;                    vid += nz;</div>
<div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;                    <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;                }</div>
<div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;                </div>
<div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;                <span class="keywordflow">if</span> (ns == 0xff) {  <span class="comment">// If 255 is not enough, then stores a 32-bit integer after.</span></div>
<div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;                    n = *((uint32_t*)ptr);</div>
<div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;                    ptr += <span class="keyword">sizeof</span>(uint32_t);</div>
<div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;                } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;                    n = ns;</div>
<div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;                }</div>
<div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;                svertex_t* vertex = NULL;</div>
<div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;                </div>
<div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;                <span class="keywordflow">if</span> (vid&gt;=window_st &amp;&amp; vid &lt;=window_en) { <span class="comment">// TODO: Make more efficient</span></div>
<div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;                    vertex = &amp;prealloc[vid-window_st];</div>
<div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;                    <span class="keywordflow">if</span> (!vertex-&gt;scheduled) vertex = NULL;</div>
<div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;                }</div>
<div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160;                check_stream_progress(n*4, ptr-adjdata);  </div>
<div class="line"><a name="l00252"></a><span class="lineno">  252</span>&#160;                <span class="keywordflow">while</span>(--n&gt;=0) {</div>
<div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;                    <span class="keywordtype">bool</span> special_edge = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;                    vid_t target = (<span class="keyword">sizeof</span>(ET)==<span class="keyword">sizeof</span>(ETspecial) ? *((vid_t*) ptr) : translate_edge(*((vid_t*) ptr), special_edge));</div>
<div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160;                    ptr += <span class="keyword">sizeof</span>(vid_t);</div>
<div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;                    </div>
<div class="line"><a name="l00257"></a><span class="lineno">  257</span>&#160;                    </div>
<div class="line"><a name="l00258"></a><span class="lineno">  258</span>&#160;                    <span class="keywordflow">if</span> (vertex != NULL &amp;&amp; outedges) </div>
<div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160;                    {    </div>
<div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;                      vertex-&gt;add_outedge(target, (only_adjacency ? NULL : (ET*) &amp;((<span class="keywordtype">char</span>*)edgedata)[edgeptr]), special_edge);</div>
<div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;                    }</div>
<div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;                    </div>
<div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;                    <span class="keywordflow">if</span> (target &gt;= window_st)  {</div>
<div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160;                        <span class="keywordflow">if</span> (target &lt;= window_en) {</div>
<div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;                            <span class="comment">/* In edge */</span></div>
<div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;                            <span class="keywordflow">if</span> (inedges) {</div>
<div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;                                svertex_t &amp; dstvertex = prealloc[target-window_st];</div>
<div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;                                <span class="keywordflow">if</span> (dstvertex.scheduled) {</div>
<div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;                                    assert(only_adjacency ||  edgeptr &lt; edatafilesize);</div>
<div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;                                    dstvertex.add_inedge(vid,  (only_adjacency ? NULL : (ET*) &amp;((<span class="keywordtype">char</span>*)edgedata)[edgeptr]), special_edge);</div>
<div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;                                    <span class="keywordflow">if</span> (vertex != NULL) {</div>
<div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;                                        dstvertex.parallel_safe = <span class="keyword">false</span>; </div>
<div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;                                        vertex-&gt;parallel_safe = <span class="keyword">false</span>;  <span class="comment">// This edge is shared with another vertex in the same window - not safe to run in parallel.</span></div>
<div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;                                    }</div>
<div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;                                }</div>
<div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;                            }</div>
<div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;                        } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<span class="keyword">sizeof</span>(ET) == <span class="keyword">sizeof</span>(ETspecial)) { <span class="comment">// Note, we cannot skip if there can be &quot;special edges&quot;. FIXME so dirty.</span></div>
<div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;                            <span class="comment">// This vertex has no edges any more for this window, bail out</span></div>
<div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;                            <span class="keywordflow">if</span> (vertex == NULL) {</div>
<div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;                                ptr += <span class="keyword">sizeof</span>(vid_t)*n;</div>
<div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;                                edgeptr += (n+1)*<span class="keyword">sizeof</span>(ET);</div>
<div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;                                <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;                            }</div>
<div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;                        }</div>
<div class="line"><a name="l00285"></a><span class="lineno">  285</span>&#160;                    }</div>
<div class="line"><a name="l00286"></a><span class="lineno">  286</span>&#160;                    edgeptr += <span class="keyword">sizeof</span>(ET) * !special_edge + <span class="keyword">sizeof</span>(ETspecial) * special_edge;</div>
<div class="line"><a name="l00287"></a><span class="lineno">  287</span>&#160;                }</div>
<div class="line"><a name="l00288"></a><span class="lineno">  288</span>&#160;                vid++;</div>
<div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160;            }</div>
<div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;            m.stop_time(<span class="stringliteral">&quot;memoryshard_create_edges&quot;</span>, <span class="keyword">false</span>);</div>
<div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;        }</div>
<div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;        </div>
<div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160;        <span class="keywordtype">size_t</span> offset_for_stream_cont() {</div>
<div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160;            <span class="keywordflow">return</span> streaming_offset;</div>
<div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;        }</div>
<div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;        vid_t offset_vid_for_stream_cont() {</div>
<div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;            <span class="keywordflow">return</span> streaming_offset_vid;</div>
<div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;        }</div>
<div class="line"><a name="l00299"></a><span class="lineno">  299</span>&#160;        <span class="keywordtype">size_t</span> edata_ptr_for_stream_cont() {</div>
<div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;            <span class="keywordflow">return</span> streaming_offset_edge_ptr;</div>
<div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;        }</div>
<div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;        </div>
<div class="line"><a name="l00303"></a><span class="lineno">  303</span>&#160;        </div>
<div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;        </div>
<div class="line"><a name="l00305"></a><span class="lineno">  305</span>&#160;        </div>
<div class="line"><a name="l00306"></a><span class="lineno">  306</span>&#160;    };</div>
<div class="line"><a name="l00307"></a><span class="lineno">  307</span>&#160;};</div>
<div class="line"><a name="l00308"></a><span class="lineno">  308</span>&#160;</div>
<div class="line"><a name="l00309"></a><span class="lineno">  309</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00310"></a><span class="lineno">  310</span>&#160;<span class="preprocessor"></span>    </div>
</div><!-- fragment --></div><!-- contents -->
<!-- start footer part -->
<hr class="footer"/><address class="footer"><small>
Generated on Thu Jul 5 2012 00:11:18 for GraphChi by &#160;<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/>
</a> 1.8.1.1
</small></address>
</body>
</html>
